Can someone identify these pulleys?

These seem to be from some old project and I can’t for the life of me remember what they were specifically … for.

I -want- to say they were bergmeister-fit pulleys, but I’m not sure that’s true when I compare them to other pictures. Figured it was better just to ask, as they might be some old variant or something!

Still trying to figure out the identity of these, if anyone has any ideas?

Kegel pulleys and abec pulleys.